Mechanism for operating swinging doors of drum weirs



F. DUWE Oct, 7, 1930.

MECHANISM FOR OPERATING SWINGING DOORS OF DRUM WEIRS Filed Feb. 5, 1927Patented Oct. 7, 1930 UNITED STATES PATENT OFFICE FRIEDRICH DUWE, FMAINZ, GERMANY, ASSIGNOR TO MASCHINENFABRIK AUGSBURG- Nlj'RNBERG A. G.,0]? NUREMBERG, GERMANY, A CORPORATION OF GERMANY MECHANISM FOR OPERATINGSWINGING DOORS OF DRUM WEIRS Application filed February 3, 1927, SerialNo.

My invention relates to a drum-Weir having its drum-body provided with aswinging door. This swinging door may be moved or swung relatively tosaid drum-body in two directions, Viz: it may be swung outwardly of thelatter, whereby said door will assume an erect position with respect tosaid drum-body, or said door may be swung inwardly with respect to thedrum-body,

m whereby it will be more or less laid down upon the cylindrical surfaceof the drum.

This invention has for its primary object to devise simple mechanicalmeans for effecting the proper swinging of said door in the mannerindicated.

During the raising and lowering of the drum-weir the door must be laiddown or swung inwardly, and therefore the swinging motion of the doormust be effected while the weir-body is lowered. In order to solve theproblem of properly swinging the door I have taken advantage of thefact, that the winch-driver chain used for raising and lowering the weirbody, is fully released from any load during the lowered position of theweir. An essential part of this invention consists in the drum-weir andthe door being operated by one and the same winch. A further feature ofthis invention consists in properly dimensioning and arranging saidchain and so connecting it with the operating means of the door, thatsaid chain after the lowering and prior to the raising of the weir maymove for some short distance in no-load condition and actuate theoperating mechanism for the door during such condition.

In the accompanying drawing showing various embodiments of a weirconstructed according to this invention,

Fig. 1 is a side-view of a drum weir and door.

Fig. 2 is a section through one end of the weir-drum.

Fig. 3 is a top plan view of a portion of the device of Fig. 1 and Fig.4 a side view of a modification of the device shown in Fig. 1.

According to Figs. 1 and 2, the endless chain 7) is driven by means ofthe pinion a of the winch a and carried around the drum 165,740, and inGermany February 15, 1926.

body (Z by: means of guiding members a, as shown in Fig. 2'. It will benoted that in the lowered position of the drum d the chain Z) isreleased from the load of the weir and may slide upon the guidingmembers 0. The chain 72 in the lowered position of the weir Will be inengagement with a gear sector 6 mounted within the body of the drum d,and projecting through a slot provided in the surface of said drum. Uponthe axle f of said gear sector 6 is mounted the crank g, which ispivoted to the rod k at one end thereof, while the other end of said rodh is pivoted to a second crank 9 which is mounted upon the axle f of asecond gear sector e The latter is disposed in the drum 03 approximatelyopposite to the gear sector e and projects through a slot provided inthe surface of the drum d, the same as gear sector 6. A secondconnecting rod 2' is pivotally connected to the crank g or what is thesame, to the connecting rod k, while the other end of the rod 2' ispivotally connected with the door is which is mounted on the drum-bodycl of the weir by means of an axle 70 which is able to resist torsionalstrains. Thechain b is further provided with a stop m at a point betweenthe pinion a of the winch and a guiding roller Z which is provided inthe rear of said winch, said stop m cooperating with fixed abutments 0and p. A suspension device g of any wellknown kind provides forsuspending said chain 72 in a plurality of parts, as indicated in Figs.1 and 3, said parts being wound up during the lifting of the drum d.

The mode of operation is as follows:

If in the lowered position of the drum 0?, as shown in the drawing, theordinarily erected door shall be turned down, for instance, prior to thelifting of the weir, the winch may be started in the direction ofrotation as indicated by the arrow in Fig. 1. The chain, which isrelieved of the weight of the drum, will then start to move under noload and slide upon the guiding members a of the drum. Thereby the gearsector e will be rotated by the crank g and the rods it and 2' and thedoor 70 will be swung about its axle into closed position. Meanwhilestop we of the chain 6 has travelled from the abutment 0 to the abutmentp, so that further movement of the chain 6 will be stopped. Now, if thedrum shall be raised, the rotation of the winch is simply continued,whereby the chain side running upon the pinion a will be wound up, thewound up parts being then kept in plurally suspended sections by thesuspension device g. During the raising of the weir-drum d, the latteris positively guided by the gear rim and rack z, and will move into theupper position as indicated by the broken lines in Fig. 1. In thismanner, the gear sector 6 will become'disengaged from the chain Z).

However, the door cannot swing again away from the drum into openposition, because the gear sector 6 has come into engagement with thechain, ere the gear sect-or 6 has left the chain, thus holding the doorclosed.

During the lowering of the weir-body the motions of the several partstake place in the opposite sequence. At first the side of the chain willbe lowered, which runs upon the pinion a of the winch simultaneouslywith the weir-body, until the chain is again released from the weight ofthe weir-drum, which rests upon the sole of the weir by means of atightening plate. Thereupon the chain continues to slide upon the guide0 in opposite direction as before, whereby the door will again beerected and the stop m moves away from the abutment 19 towards theabutment 0. As soon as it strikes 0, the winch will be stopped.

In the embodiment shown in Fig. 4 one end of the chain 6 which runs overthe pinion a of the winch, is so fixed on the outside of the weir-bodyd, that a certain part of the chain in the lowered position of the weirwill partly surround the weir-body. The other end of the chain iscarried over a a guiding wheel 1' to a chain-wheel s and simwill therope upon a greater length by the rope than the pulley 'w is surroundedby the end of the rope fixed thereto. A crank 9 which is mounted uponthe axle of the pulley, is again connected by means of the rod 2' withthe door is, which is mounted upon the drumbody d of the weir. To thepulley w there is further fixed the end of a second rope which partlysurrounds the pulley, said second rope being carried over a reversingroller 1- while the other end of said rope will e surrounded in one endposition-of be loaded by the weight y, said weight serving to keep theropes u and w in stretched condition.

If in this construction after the lowering of the weir-body, the door70, which during this time is swung towards the drum, is to be erected,the winch is still further rotated in the direction indicated by thearrow. The chain 6 will then simply be in loosely suspended conditionbetween the drum and the pinion a, while the pulley t is rotated by theside of the chain, which is fixed to the pulleyv s. The rope u willthereby be kept in stretched condition. In consequence thereof thepulley w, which is mounted in the interior of the drum (Z, will berotated in the direction indicated by the arrow, and the door will beerected by the crank g and the connecting rod 71 The rope :12, whose endwill thereby be further wound upon the pulley w, will be kept undertension by the weight 7 when being lifted.

In the opposite way, during an inward swinging of the door k, which maybe desired prior to the raising of the drum-body of the weir, the partof the chain which is in loosely suspended condition between the piniona and the weir-body d will be lifted. The weight y exerting a pull onthe rope m will thereby rotate the pulley w in opposite direction to thearrow shown in the drawing. By reason of this, on the one hand, the door70 will again beswung by means of the crank g and the rod 2' and on theother hand, the end of the rope M which is fixed upon the loo pulley wwill be wound up, so that by action of the rope u the pulley t will berotated in the direction of the double-arrow shown in the drawing, andthe end of the chain, which is fixed to the chain-wheel, will be woundup. 105 After such swinging of the door is, the weight 3 will come torest upon a proper support, so that the pulleys w, t, the ropes u, m andthe end 8 of the chain will come to standstill, while the part of thechain which runs upon no the pinion s of the which will be wound up, thethus wound up part of the chain again adjusting itself with respect tothesuspension devlce and the ropes a; and it being partly wound upon theweir-body during its upward n5 motion.

I claim:

1. In a drum-weir provided with a swinging door, means for both raisingand lowering the drum, and means operatively con- 12o nected with saidfirst-named means for opening and closing said swinging door.

2. In a drum-weir provided with a swinging door, a chain passin aroundthe drum, means formoving said 0 ain in either direction to therebyraise and lower the drum, and operating means for said swinging doorcarried by said drum and operatively connected with said chain and saiddoor for opening and closing the same.

3. In a drum-weir provided with a swinging door, a chain passing aroundthe drum, a winch for moving said chain in. either direction to raiseand lower the drum, and means operatively connected with said chain andsaid door for opening and closing the same, said chain being relieved ofthe weight of the drum after the lowering, and prior to the raising, ofthe drum.

4. In a drum-weir provided with a swinging door, an endless chainpassing around the drum being in sliding engagement therewith, two gearsectors provided on said drum in opposite relation to each other andadapted to be engaged by said chain, means operatively connected withsaid gear sectors and said door, and a winch for pulling said chain ineither direction to thereby raise and lower the drum and simultaneouslyoperate said door by means of said gear sectors.

5. In a drum-weir provided-with a swinging door, an endless chainpassing around the drum being in sliding engagement therewith, two gearsectors provided on said drum in opposite relation to eachother andadapted to be engaged by said chain, means operatively connected withsaid gear sectors and said door, a winch for pulling said chain ineither direction to thereby raise or lower the drum and simultaneouslyoperate said door by means of said gear sectors, a guide-roller on theframe-work of said winch, a stop provided on said chain at a pointintermediate said winch and said guide-roller, and fixed abutmentsadapted to coo crate with said stop so as to prevent the sli ing of saidchain upon said drum after the opening and closin of said door.

n testimony whereof I aflix my si ature.

' FRIEDRICH D

